#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

int main()
{
    close(1);
    int fd1 = open("log1.txt", O_WRONLY | O_CREAT | O_TRUNC, 0666);
    printf("fd1: %d\n", fd1);
    fprintf(stdout, "helloworld\n");
    //fflush(stdout);
    //close(fd1);
    fclose(stdout);
    return 0;
}


